GA(deps): Bump haskell-actions/setup from 2.8 to 2.9

Bumps [haskell-actions/setup](https://github.com/haskell-actions/setup) from 2.8 to 2.9.
- [Release notes](https://github.com/haskell-actions/setup/releases)
- [Commits](haskell-actions/setup@v2.8...v2.9)

---
updated-dependencies:
- dependency-name: haskell-actions/setup
  dependency-version: '2.9'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -66,7 +66,7 @@ jobs:
     steps:
     - uses: actions/checkout@v6
 
-    - uses: haskell-actions/setup@v2.8
+    - uses: haskell-actions/setup@v2.9
       id: setup-haskell-cabal
       name: Setup Haskell
       with: